I revised this post with some corrections and some other fixes.
Regarding the decision as to which light spectrum a grower targets or pursues...for their plants to receive from their LED lights...it seems most growers (not all) prefer the typical, commonly found spectrum like the 1st graph below.
Researchers work hard to bring us great technologies and it has helped in getting us some great LED grow lights.
However, the common spectrum (found in LED grow lights) has the following problematic attributes (problematic compared to the sunlight/daylight...the benchmark)
1) insufficient or ZERO UVB
2) insufficient or zero UVA
3) huge blue sharp spike at around 450nm
4) sharp strong drop in cyan 480nm
5) LED's have a generally upward rising line graphed from 400nm - 700nm (i.e. visible range) (sunlight slopes downward from 450nm 800nm)
6) a massive spike in red at 655nm, towering over the whole thing
6) red sharply falls off above 670nm
7) little to no Far Red (FR) 700nm-800nm
Below is a commonly found spectra which most growers seem satisfied with.
Light brand #1:
Light brand #2
Meanwhile the graph of the sunlight spectra looks entirely different; see below
Above is the natural daylight which hits all plants on earth.
Scientists, Researchers and Doctors have exceedingly limited research methods but their knowledge is increasing by leaps and bounds...
despite major scientific breakthroughs, many more breakthroughs are in the works and yet to come.
As opposed to the common grower's LED, the sunlight/daylight has the following attributes.
1) perfect amount of UVB
2) Perfect amount of UVA
3) the sun's graph line gradually rises from below 280nm to 450nm
4) and then the sun's graph line gradually and in small increments decreases from 450nm to beyond 800nm
4) sun has no big gap around cyan (i.e. 465nm - 520nm)
5) sun has a generally DOWNWARD sloping line graphed from 450nm - 700nm (i.e. visible range)...sun is reverse of LED's
6) sun has no sharp drop off around 670nm
Our ecosystem thrives perfectly under the natural sunlight...the sun's spectra can't be improved upon by science.
It will be very helpful to me if you shared with me your opinion on LED grow lights that don't have the sunlight's perfect spectrum or a least why doesn't this grow light industry acknowledge the elephant in the room...(i.e. the Sun and the outdoor plants).
I saw something that has me convinced that soon, the sun's spectrum (as seen above) will be found to be the ultimate benchmark that all grower's will eventually start to pursue. Your thoughts please...
Regarding the decision as to which light spectrum a grower targets or pursues...for their plants to receive from their LED lights...it seems most growers (not all) prefer the typical, commonly found spectrum like the 1st graph below.
Researchers work hard to bring us great technologies and it has helped in getting us some great LED grow lights.
However, the common spectrum (found in LED grow lights) has the following problematic attributes (problematic compared to the sunlight/daylight...the benchmark)
1) insufficient or ZERO UVB
2) insufficient or zero UVA
3) huge blue sharp spike at around 450nm
4) sharp strong drop in cyan 480nm
5) LED's have a generally upward rising line graphed from 400nm - 700nm (i.e. visible range) (sunlight slopes downward from 450nm 800nm)
6) a massive spike in red at 655nm, towering over the whole thing
6) red sharply falls off above 670nm
7) little to no Far Red (FR) 700nm-800nm
Below is a commonly found spectra which most growers seem satisfied with.
Light brand #1:
Light brand #2
Meanwhile the graph of the sunlight spectra looks entirely different; see below
Above is the natural daylight which hits all plants on earth.
Scientists, Researchers and Doctors have exceedingly limited research methods but their knowledge is increasing by leaps and bounds...
despite major scientific breakthroughs, many more breakthroughs are in the works and yet to come.
As opposed to the common grower's LED, the sunlight/daylight has the following attributes.
1) perfect amount of UVB
2) Perfect amount of UVA
3) the sun's graph line gradually rises from below 280nm to 450nm
4) and then the sun's graph line gradually and in small increments decreases from 450nm to beyond 800nm
4) sun has no big gap around cyan (i.e. 465nm - 520nm)
5) sun has a generally DOWNWARD sloping line graphed from 450nm - 700nm (i.e. visible range)...sun is reverse of LED's
6) sun has no sharp drop off around 670nm
Our ecosystem thrives perfectly under the natural sunlight...the sun's spectra can't be improved upon by science.
It will be very helpful to me if you shared with me your opinion on LED grow lights that don't have the sunlight's perfect spectrum or a least why doesn't this grow light industry acknowledge the elephant in the room...(i.e. the Sun and the outdoor plants).
I saw something that has me convinced that soon, the sun's spectrum (as seen above) will be found to be the ultimate benchmark that all grower's will eventually start to pursue. Your thoughts please...